mfdecodersourcereader.cpp

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "mfdecodersourcereader_p.h"

#include <decoder/mfdecodersourcereadercallback_p.h>

#include <QtCore/qdebug.h>

#include <QtCore/qlogging.h>

#include <mfapi.h>

#include <mferror.h>

#include <system_error>

QT_BEGIN_NAMESPACE

ComPtr<IMFMediaType> MFDecoderSourceReader::setSource(const ComPtr<IMFMediaSource> &source, QAudioFormat::SampleFormat sampleFormat)

    ComPtr<IMFMediaType> mediaType;

    m_sourceReader.Reset();

    if (m_sourceReaderCallback) {

        disconnect(m_sourceReaderCallback.Get());

        m_sourceReaderCallback.Reset();

    if (!source)

        return mediaType;

    m_sourceReaderCallback = makeComObject<MFSourceReaderCallback>();

    connect(m_sourceReaderCallback.Get(), &MFSourceReaderCallback::finished, this,

            &MFDecoderSourceReader::finished);

    connect(m_sourceReaderCallback.Get(), &MFSourceReaderCallback::newSample, this,

            &MFDecoderSourceReader::newSample);

    ComPtr<IMFAttributes> attr;

    MFCreateAttributes(attr.GetAddressOf(), 1);

    if (FAILED(attr->SetUnknown(MF_SOURCE_READER_ASYNC_CALLBACK, m_sourceReaderCallback.Get())))

        return mediaType;

    if (FAILED(attr->SetUINT32(MF_SOURCE_READER_DISCONNECT_MEDIASOURCE_ON_SHUTDOWN, TRUE)))

        return mediaType;

    HRESULT hr = MFCreateSourceReaderFromMediaSource(source.Get(), attr.Get(), m_sourceReader.GetAddressOf());

    if (FAILED(hr)) {

        qWarning() << "MFDecoderSourceReader: failed to set up source reader: "

                   << std::system_category().message(hr).c_str();

        return mediaType;

    m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_ALL_STREAMS), FALSE);

    m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);

    ComPtr<IMFMediaType> pPartialType;

    MFCreateMediaType(pPartialType.GetAddressOf());

    pPartialType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio);

    pPartialType->SetGUID(MF_MT_SUBTYPE, sampleFormat == QAudioFormat::Float ? MFAudioFormat_Float : MFAudioFormat_PCM);

    m_sourceReader->SetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), nullptr, pPartialType.Get());

    m_sourceReader->GetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), mediaType.GetAddressOf());

    // Ensure the stream is selected.

    m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);

    return mediaType;

void MFDecoderSourceReader::readNextSample()

    if (m_sourceReader)

        m_sourceReader->ReadSample(MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, NULL, NULL, NULL, NULL);

QT_END_NAMESPACE

#include "moc_mfdecodersourcereader_p.cpp"